Car-door.



T. SCULLIN & S. R; SKOV.

CAR DOOR.

APPLIGATION FILED JAN. 26, 1912.

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i i ML llILllMllW 's IN lillllillll||||||||||||n|||||||||||||||||l wfi/zzfozjg Patented Apr. 21, 1914.

T. SGULLIN & S. R. SKOV.

. GAR DOOR. APPLICATION FILED JAN. 26, 1912.

1,093,731. Patented Apr. 21, 191 1 7,

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COLUMBIA PLANOG T. SGULLIN. &' s. R. SKOV OAR DO0R..

APPLICATION FILED JAN. 26

Patented Apr. 21, 1914.

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COLUMBIA PLANOGIAPH CO.,WASMINOTON, u. I

T. SOULLIN & S. R. SKOV.

. GAR DOOR.

APPLICATION FILED JAN. 26, 1912. 1,093,731. Pat nted Apr. 21, 1914,

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WITNESSES Q5 AZ/om COLUMBIA PLANOGRAPH $0.,wASHlNflTON. D c.

UNITED STATES PATENT OFFICE.

TERANCE SGULLIN AND SOREN ROBERTSON S'KOV, OF CLEVELAND, OHIO.

GAR-DOOR.

Specification of Letters Patent.

Patented Apr. 21, 1914.

Application filed January 26, 1912. Serial No. 673,646.

which will not injure a passenger in the event that the mechanism for closing the door is operated before the passenger has passed through the doorway; and with this and minor objects in View our invention consists of the parts and combination of parts as will be hereinafter more fully pointed out.

In the drawings, Figure 1 is a side elevation of the door operating mechanism, parts being broken away; Fig. 2 is a sectional view on the line 5-5, Fig. 1, looking inthe direction of the arrow; Fig. 3 is a detail sectional View on the line 66, Fig. 1, looking in the direction of the arrow; Figs. 4, 5 are detail side elevations of the flexible point for the sliding doors; Fig. 6 is a detail sectional View on the line 9-9, Fig. 5; Fig. 7 is an enlarged detail view of the platform and associated parts; Fig. 8 is a side elevation of a car broken away, showing in dotted lines the conductors door and step control lever.

The numeral 1 designates the upper frame of a car.

The step 36 is of the modern hinged type adapted to be folded up against the side of the platform side stringers when the doors of the car are closed.

The doors of the car, according to our invention, are of the sliding type and are designated by the reference numerals 30, 31, 32 and 33. V

34 is the inner wall of the platform and 35 the outer wall, the walls of the vestibule forming a pocket into which the doors slide.

36 is a lever conveniently positioned in a car. with reference to the conductors station, by means of which the conductor may readily open and close the doors and raise and lower the step 36 This lever is mounted on a revoluble shaft 36 suitably journaled underneath the car platform. 36 is a lever rigidly keyed to the shaft 36", the upper end of said lever being provided with a block adapted to reciprocate in a slot 36 on one of the doors, as best seen in Fig. 8.

The lower end of the lever 36 is connected by means of a rod 36 to a bell crank lever 36, one arm of the bell crank lever carrying a rod 36 to which is pivotally connected a rod 36, the outer end of which is connected as at 36 to the step 36. A rod 36 is connected' at one end to the bell crank lever 36 and at its other end is connected to a crank 36 which in turn is keyed to the shaft 36 whereby the shaft is revolved thus operating the lever 36, as will be understood. Thus it will be seen that a counter-clockwise rotati'on of the conductors lever 36 causes a clockwise rotation-of the lever attached to the door, the said door moving toward its open position. The door hanger bracket attached to the door is the means of trans mitting the motion of the single door to the rack and pinion mechanism for operating the remaining doors, the said doors being mounted on hangers 38, 39, 40 and 41, which are provided with suitable rollers 42 adapted to travel on tracks 37. The door 33 is mounted on the hanger 41, while the door 32 is mounted 011 the hanger 38, the door 31 is mounted on the hanger 40, and the door 30 is mounted on the hanger 39. The hangers 40 and 41 are provided respectively with a toothed rack 43 and 44, having on their forward ends a guide roller 45, 46, which travel in a guide track 47, 48. The hangers 38 and 39 are provided respectively with toothed racks 49 and 50.

51 is a large pinion, the teeth of which are engaged by the teeth of the rack bars 43 and 44. 52 is a small pinion, one-half of the diameter of the pinion 51, the teeth of which are engaged by the teeth of the respective rack bars 49 and 50. The pinion 51 preferably has fifty-two teeth, while the pinion '52 has preferably twenty-six teeth. These pinions are mounted on a common shaft 53.

' 56 and 57 are idlers adapted to hold the rack bars 49 and 50 in engagement with the teeth of the pinion 52, while 58 and 59 are idlers to hold the rack bars 43 and 44 in engagement with the teeth of the pinion 51. The rack bars 43 and 44 are provided re spectively, with an extension 60 and 61, the rear end of which is turned up to form a stop 62.

63 is a bearing suitably mounted on the door hanger bracket with reference to the rack bars 43 and 44 in which the extension 60 and 61 has a sliding bearing.

64 is a rod sliding in the bearing 68, around which a coil spring 65 is disposed as clearly seen in Figs. 4C and 5, said coil spring being seated at one end against the shoulder 62 and at the other end against the bearing 63.

The object of the construction shown in Figs. 4C, 5 and 6, which forms a flexible joint for the outer doors, will now be stated.

Frequently passengers are injured by the conductor or motorman closing the door before the passenger passes through the door way, thus pinning the passenger between the doors or between the door and door frame,

and as the doors are operated positively there was no way, before our invention, to prevent the passenger being injured, or to stop the door. According to our invention, if the operator starts to close the doors before a passenger has passed between the doorway and the outer doors 31, 33, should they come in contact with the passenger, thesedoors will be instantly stopped by contact with the passenger, while the doors 30 and 32 will continue in their closing movement. To accomplish this, we provide a flexibiejoint in the operating racks for the outer doors 31 and 33, which flexible joint consists of the extension and 61; the rod 64:, the spring (35, the bearing 63 and the stop 62. \Ve will assume that the doors 31 and 33, come in contact with a passenger, whereupon the doors cease to move, but the propelling racks 43 and 44: continue their motion by reason of their engagement with the pinion 52, until the spring 65 is compressed to its minimum length. The instant the passenger steps from between the doors 31 and 33, the compression spring (35 provides sufficient power to close the doors tightly. It will be understood that it is only necessary to provide this flexible connection for the two doors which meet in Y the middle of the doorway because there is.

always suflicient room between the doors 30 and 32 for a passenger to pass through the doorway irrespective of the fact whether these doors are in their open or closed position.

hat is claimed is 1. In a car door operating mechanism, the combination with a pair of sliding doors moving in the same direction, of operating mechanism for said doors, a slip joint between one of the doors and the operating mechanism to permit the said mechanism to continue its movement when the said door meets an obstruction, and means storing energy when the said mechanism operates in dependently of the door to close the door after the obstruction is removed.

2. The combination with a pair of sliding doors moving in the same direction, of means moving said doors at dilferent rates of speed, and means permitting one of the doors to stop on meeting an obstruction without stopping the other door.

3. The combination with a pair of sliding doors moving in the same direction, of means moving said doors at diiferent rates of speed, means permitting one of said doors to stop on meeting an obstruction without stopping the other door, and means to store energy when said door is obstructed, whereby the door is moved to closed position when the obstruction is removed.

4-. The combination with a pair of sliding doors; of a rack bar connection with each door, a small pinion engaging one of said racks and a large pinion engaging the other of said racks, said pinions being mounted on a common shaft, and a flexible connection between one of said racks and its door.

5. The combination with a pair of sliding doors, of a rack bar connected with each door, a large pinion engaging one of said racks and a relatively small pinion engaging the other of said racks, said pinions being mounted on a common shaft, a bearing on which the rack engaging the larger pinion may slide, a bar extending from said hearing beyond a coiled spring secured on said rod, one end of which is seated on the hearing and the other on the rear end of the rack bar.

6. The ombination with two pair of sliding doors, each door of each pair sliding in the same direction, tracks for said doors, of a large pinion and a small pinion mounted on a common shaft, the small pinion being one-half the diameter of the large pinion, a rack bar extending from one door of each pair and engaging the large pinion and a rack bar extending from the other door of each pair and engaging the smaller pinion, whereby one door of each pair may travel twice as fast as the other door, and. a flexible connection between the racks that engage the larger pinion and its respective door.

The foregoing specification signed at Cleveland, Ohio, this 5th day of J an., 1912.

TERANOE SOULLIN. SOREN ROBERTSON SKOV.

In presence of two witnesses:

CHAS. A. D. G. Son, A. DE Oarnw.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

